Valve



Dec. 23, i941.

Filed NOV. 20, 1940 J. VERNER K VALVE INVENTOR y a/e5 /erfffr ATTORNEYPatented Dec. 23, 1941 UNITED STATES PATENT OFFICE VALVE Jules ver-ner,Linden, N. J. Application November zo, 1940, serial No. 366,319

i (ci. 251-49) 3 Claims.

This application relates to valves of the type ordinarily used inrelatively large lines to control industrial production or the ow ofwater or the like. In other words, it is intended for the same type ofservice where gate'valves are frequently employed.K A

Y Broadly speaking, my valve comprises an enlarged chamber having anopening at each end equal to the inside diameter of the line. One end isfree and the other end contains a circular valve seat. Ordinarily, thevalve will be positioned so that the end containing the seat is theinlet end andthe other is the outlet. Positioned in the enlarged chamberand supported by guides 'running to the sides of the chamber is amovable plug member preferably streamlined `chamber through a stuffingbox and ordinarily will be seated in a closed bearing at its other end.'This shaft passes through the movable member/and carries an eccentriccam. This cam is so Iarranged that it will move the plug positively backand forth to and from the valve seat and when the plug is seated on thevalve seat, the cam will be almost in its extreme deadcenter position.This means that when the cam is in this position, it will be exerting amaximum force to close the valve and at the same time the thrust of theline pressure against the movable member will be almost a direct thrustagainst the cam so that there will be little or no tendency for the linepressure to open the valve. This leverage effect and resistance againstdisplacement can further be increased by operating'the shaft through themedium of a worm gear. 0 1'-k dinarily the shaft and the side supportsfor the movable member will be in alignment. It is also an importantfeature of my invention that the cooperating seating surfaces of theplug and casing are removable without removing the plug be understood byreference-to the accompanying drawing in whichlig. 1 is a longitudinalsection through a valve embodying my invention; Fig. 2 is a longitudinalsection taken at right angles to the section shown in Fig. 1 and Fig.` 3is a transverse section taken on line 3--3 of Fig. 1 and show n on aslightly reduced scale.

In the drawing, the numeral I0 designates the main valve casing which iscircular in shape and of a relatively simple contour so that it can beforged of steel, if desired. .This casing I0 is here illustrated asprovided with anges I2 for attachment to adjacent sections of' pipe asshown in Fig. 1.

At one end the casing threaded to receive a removable valve seat I4.When this valve seat I4 is removed a clear opening into the interior ofthe casing I0 is provided large enough to receive the plug I6. The plugI6:

has a spherical nose portion and at its opposite end it is preferablystreamlined or given a tapered or tear drop shape. the plug I6 isprovided with two pairs of guide members I8, and the casing I0 isprovided with two guide anges 20 which cooperate with the guide membersI8 to hold the plug I6 so that it can move along the line of the axis ofthe valve without any great amount of rotation and yet still havesufficient freedom to move transversely so that it can seat accurately.The plug I6 preferablyhasaremovable nose portion 22 which locks in placea contact ring 24 which contacts with the removable seating member I4.By this construction by rst removing member I4 and then removing members22 and 24, both of the seating members are easily removable forreplacement or re-grinding.

The plug I 6 is moved longitudinally in the casing I0 by an internal cam26 mounted on a shaft 28. The shaft'28 is here shown as having alongitudinal end portion which rotates in a bearing l 30 welded into theside of the casing III, and as having a central squared portion which tsinside the cam 26 and a slightly larger cylindrical portion whichextends out of the plug I6. Longitudinal slots 32 and 34 are formed inthe sides of the plug I6. A bearing 36 is provided with a gland 38 and alocking ring 48 which operates on packing 42 to prevent leakage aroundthe end of theshaft 28 which extends out of the valve casing.

In order to insert the cam 26 into the plug I6,

a cylindrical opening is formed in one side of the plug which receives aside member 44 in which is formed the slot 34'. When the cam 26 has beeninserted in the plug I6 the member 44 is forced in and preferably weldedin place.

'I'he opening for the cam 26 should be so shapedYV that the cam wilLmovefreely at the sides, and it may be s o shaped as to permit the cam fullmove- I0 is recessed and At the tapered endment at the tapered end aftermoving the plug to retracted position. However, in order that the valvemay be closed tightly, the opening at the nose end should be such thatthe cam member 26 cannot quite reach dead center. In Fig. 2 the partsare shown with the plug I6 fully seated and the cani 26 still 15 degreesfrom the dead center position.

While this 15-degree oifset is close enough to dead center so thatordinarily the plug would be wedged xedly in place by the cam in thisposition, anyV danger of having the valve open under pressure iseliminated by having the shaft 28 operated through the irreversible wormgears 46 which in turn may be driven by a hand wheel 48.

It will be noted that with this construction the fluid passing throughthe valve will ilow smoothly around the streamlined plug I6 and the onlyinterruptions to its ow are the shaft 28 and the g'uide ilanges I8 and2U. These flanges are preferably aligned with the shaft and thereforegive a minimum of obstruction.

By employing the internal cam coupled with the guide flanges, the plugis free to seat itself accurately in the valve on closing and themechanics of its operation are exceedingly simple. The only opening intothe valve chamber from outside the line is the single opening for theshaft 28, and this can readily be kept tight by the use of the usualpacking.

It is understood that the; example shown is given only by way ofillustration, and the same may be modied in many particulars withoutdeparting from the spirit of my invention.

What '1 claim is:

1. In a valve of the type described,`the combination of a plug ofapproximately tear-drop shape having a. contact portion at its blunt endadjaceni'to but not including the ronelof maximum diameter of the plugand having guideseating member adapted to be held in said plug receivingopening, having walls of a thickness approximately to cover the contactportion o1' the plug and cam means comprising a shaft passing throughthe casing wall for moving said plug longitudinally.

2. A structure as specified in claim 1 in which the cam mechanism issubstantially enclosed within the plug to eliminate undue eddy currentsin the fluid passing through the valve.

3. A structure as specii'led in claim 1 in which the cooperating guidesand the operatlngshaft are aligned to provide a minimum of interference

